Hello Bahaa Horani, Link Removed to Windows 7 Forums,
During the setup/installation, there should have been an option to install for "Me only"/"This User Only" or something to that effect.
If you missed that option (which is usually located in the bottom left corner of the installation window) it would have used the default, which is, "Install for all users".
To correct it or remove from the other users, uninstall the app and reinstall using the "for me only" or whatever it says pertaining to you only.
Hope this helps
Don